13227768181 has 2 divisors, whose sum is σ = 13227768182. Its totient is φ = 13227768180.

The previous prime is 13227768097. The next prime is 13227768193. The reversal of 13227768181 is 18186772231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13188455281 + 39312900 = 114841^2 + 6270^2 .

It is a cyclic number.

It is not a de Polignac number, because 13227768181 - 2⁷ = 13227768053 is a prime.

It is a super-2 number, since 2×13227768181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13227768581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6613884090 + 6613884091.

It is an arithmetic number, because the mean of its divisors is an integer number (6613884091).

Almost surely, 2^13227768181 is an apocalyptic number.

It is an amenable number.

13227768181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13227768181 is an equidigital number, since it uses as much as digits as its factorization.

13227768181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The spelling of 13227768181 in words is "thirteen billion, two hundred twenty-seven million, seven hundred sixty-eight thousand, one hundred eighty-one".